MB Tutorial Part 23: Relation Constraints

This video covers the workflow and uses of the Relations Constraint within Motionbuilder.

[@vlncurlyfri]

What kinds of operators would you use to constrain 2 hands to a weapon? I've got an animation of a character showing off his martial arts moves by twisting and turning his weapon in his hands, like something you'd see Jackie Chan doing with a stick before he fight his enemies. I've used a parent/child constraint on one hand (the parent is the weapon and I've made the 2nd FK middle finger knuckle the child) but when i put a parent/child constraint on the 2nd hand, it does constrain to the weapon, but the arm stretches because the rest of the arm isn't being told to follow the constrained hand. Sounds like using relations constraints would solve my problem, but I'm not sure what specific operators I'll need. Anyone have an answer? Thank you very much in advance!

[@vlncurlyfri]

Nevermind.. figured out my problem. my IK blend for the translation and rotation for the wrist effector was set to zero.. lol I know I said I parented the weapon to the middle finger knuckle, but I also tried parenting it to the wrist effector on my characters control rig and nothing happened.. till I turned the IK blend to 100%! lol